[build] Nothing can be prepended to QUIET_* rules
[build] Nothing can be prepended to QUIET_* rules

Move the LD_LIBRARY_PATH override after the QUIET_GEN rule and
unbreak the typelib compilation.

Backport from master:

  f655b28e669b7aec5b3ace0d8873adeefa11b4de

tardyp/clutter,tardyp/clutter,tardyp/clutter